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EN-MC35110 Magnesium vs. ASTM A372 Grade H Steel

EN-MC35110 magnesium belongs to the magnesium alloys classification, while ASTM A372 grade H steel belongs to the iron alloys. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is EN-MC35110 magnesium and the bottom bar is ASTM A372 grade H steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 45
190
Elongation at Break, % 3.1
20 to 22
Fatigue Strength, MPa 110
310 to 380
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
73
Shear Strength, MPa 130
410 to 570
Tensile Strength: Ultimate (UTS), MPa 230
650 to 910
Tensile Strength: Yield (Proof), MPa 150
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 330
250
Maximum Temperature: Mechanical, °C 140
410
Melting Completion (Liquidus), °C 600
1460
Melting Onset (Solidus), °C 520
1420
Specific Heat Capacity, J/kg-K 970
470
Thermal Conductivity, W/m-K 110
45
Thermal Expansion, µm/m-K 26
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 18
2.3
Density, g/cm3 1.9
7.8
Embodied Carbon, kg CO2/kg material 24
1.5
Embodied Energy, MJ/kg 170
20
Embodied Water, L/kg 940
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.3
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 260
500 to 810
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 63
24
Strength to Weight: Axial, points 34
23 to 32
Strength to Weight: Bending, points 44
21 to 27
Thermal Diffusivity, mm2/s 61
12
Thermal Shock Resistance, points 14
19 to 27

Alloy Composition


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Carbon (C), % 0
0.3 to 0.4
Chromium (Cr), % 0
0.4 to 0.65
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
97.3 to 98.3
Magnesium (Mg), % 92 to 95.4
0
Manganese (Mn), % 0 to 0.15
0.75 to 1.1
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0 to 0.010
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Unspecified Rare Earths, % 0.75 to 1.8
0
Zinc (Zn), % 3.5 to 5.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0